And Now The Weather … On Mars!
SpaceDaily

The climate models formulated by ESA scientists show us the pattern of the storms throughout the Martian year, but the mystery remains why some years are dustier than others. Mars Express, the ESA mission to the Red Planet that is due to arrive in December 2003, will be sending back data that could help us solve this mystery and perfect our weather maps of Mars. The mission has been timed to arrive at Mars at the end of the Martian winter in the northern hemisphere, making it highly unlikely that there is a dust storm at the time of arrival.